Capable of sensing very low positive or negative pressures, reliability and long life are inherent advantages of this design. Extremely easy set point adjustment: 1) Loosen the lock ring, 2) Turn interface either left or right until pointer is at the desire pressure or vacuum on range label, 3) Retighten the lock ring, and 4) Verify the adjustment by applying pressure or vacuum. See Switch Accessories at omega.com for
Audible Alarms and Relay Modules.

PRESSUREMODELS

ADJUSTABLE RANGE (psig)

DEADBAND(psig)

REPEATABILITY(psi)

MAX SYSTEMPRESSURE (psi)

SWITCH

DECREASING

INCREASING

PSW-521

0.8 to 28.5

1.6 to 30

0.8 to 1.3

±0.6

30

1 A

PSW-522

2.0 to 38.3

3.0 to 40

1.0 to 1.7

±1.0

50

1 A

PSW-523

3.0 to 96.5

4.5 to 100

1.5 to 3.5

±2.0

100

1 A

PSW-524

7.5 to 242.5

9.7 to 250

2.2 to 9.0

±5.0

250

1 A

PSW-525

15 to 458

20 to 500

5.0 to 21

±10

500

1 A

PSW-531

0.8 to 16.3

1.2 to 20

0.6 to 3.7

±0.8

3,000

5 A

PSW-532

2.0 to 42.5

2.0 to 50

0.8 to 7.5

±2.0

3,000

5 A

PSW-533

4.0 to 91

4.0 to 100

1.1 to 9.0

±4.0

5,000

5 A

PSW-534

10 to 222

10 to 250

2.2 to 28

±10

5,000

5 A

PSW-535

20 to 432

20 to 500

3.5 to 68

±20

5,000

5 A

PSW-536

50 to 700

100 to 800

20 to 100

±40

5,000

5 A

VACUUMMODELS

ADJUSTABLE RANGE (inHg)

DEADBAND(inHg)

REPEATABILITY(inHg)

MAX SYSTEMPRESSURE (inHg/psi)

SWITCH

DECREASING

INCREASING

PSW-541

1.6 to 27.0

2.7 to 28.2

1.3 to 2.7

±1.2

29.9/0

1 A

PSW-542

4.0 to 24.8

5.1 to 28.2

1.5 to 3.2

±2.0

29.9/0

1 A

PSW-543

6.0 to 21.5

8.4 to 28.2

2.0 to 7.3

±4.0

29.9/0

1 A

PSW-551

1.2 to 22.5

1.6 to 28.2

1.1 to 5.7

±1.6

29.9/3000

5 A

PSW-552

1.2 to 21.8

8.0 to 28.2

8.0 to 6.4

±8.0

29.9/5000

5 A

Exceeding Max System Pressure may cause a shift in the setpoint.

PSW-560 (1-AMP) AND PSW-570 (5-AMP) SERIES PERFORMANCE TABLE

MODEL

NOMINALSETPOINT(PSI)

DEADBAND1 AMP/5AMP

REPEATABILITY(±PSI)

PSW-561PSW-571

5001000150020002500

70/12080/13090/145100/160110/180

255075100125

PSW-562PSW-572

60010001500200025003000350040005000

113/186145/220190/262235/305280/345325/385364/430410/470410/470

456085100125150175200250

PSW-563PSW-573

7001000150020003000400050006000

177/455210/620247/730300/820315/980340/1000355/1110375/1280

657585100150200250300

1 AMPMODEL

5 AMPMODEL

ADJUSTABLE RANGE (psig)

MAX. SYSTEMPRESSURE (psig)

PROOFPRESSURE (psig)

DECREASING

INCREASING

PSW-561

PSW-571

500 to 2390

500 to 2500

3000

4500

PSW-562

PSW-572

600 to 4500

600 to 5000

5000

7500

PSW-563

PSW-573

700 to 5500

700 to 6000

6000

9000

Exceeding Max System Pressure values may cause a shift in the setpoint.

Caution: Pressure switches are manufactured to the highest quality specifications. However, due to their economical construction, they should be used only for applications where, in the event of product failure, the risk of damage to equipment or personnel is minimal